Device for supporting trolley-wires.



C. DE RANDO.. DEVICE FOBr SUPPORTING TROLLEY WIRES.

MPLIGATIQN FILED MAR.2s,19o7.

EL u Patented Maz', 10, 19 M.

E BHEETS-SHEET 1.

C. DE RANDO.

DEVICE EOE SUPPORTING TROLLEY WIRES.

APPLICATION FILED MAR.26. 1907.

" Patented mar. w, im. Y

2 EEETB-SHBET 2.

lill lll Aras Para l CGIJOMAN mi KAND, UF BUDAPEST, AUSTRIA-HUNGARY, A.SSGrNOR T0 (il-IE WESTINGHO'USE 0F PITTSBURGH, PENNSYLVANEA. I

lal'lldlllii Specification of Letters Patent.

Patented Mar.. 10, 1914..

Application filed March 26, 1907. Serial No. 364,565.

To all lwhom it may] concern Be it known that l, CoLoMAN DE KAND, a subject ot the King oi' Hungary, engineer, residing at Budapest, in the Empire of Austria-Hungary, have invented new and useful Improvements in Devices for Supporting lrolleydl'virem and l do hereby de claro thetollowing to be a full, clear, and exact description of the same.

This invention relates to supporting or steadying means for trolley wires and has for an object-'to produce means'which Will prevent lateral displacement of the supported trolley wire and will permit the wire to move in a vertical or an approximately vertical plane under the influence of upward pressure, as for example, the pressure imparted by the trolleys.

A further object to produce a supporting or` steadying means for trolley Wires which is adapted to be employed on curves and vwhich will not change its position when subjected to variations in the tension or pull ott' the trolley wires and which will yield to the upward pressure of the trolleys in suchv a manner that the wire will move vertically or approximately so.

These and other objects -ll attain by means ot the apparatus illustrated in the drawings accompanying this application and forming a part thereof.

In the drawings .Figure l is a diagrammatic illustration ot' the ordinary means employed for supporting or steadying trolley Wires on curves and is shown in connection With a torce diagram. Fig. 2 is a diagrammat-ic illustration oi a supporting device embodying my invention. Fig. 23 is a force diagram illustrating the directions and Amagnitudes of the force acting on the device illustrated in Fig'. 2. lFig. Il is a plan view of a modified form of the device illustrated in Fig. 2. Fig. is a modified arrangement of thedevice illustrated in'Fig. 2. Fig. 6 is a diagrammatic illustration in connection with force diagrams .and illustrates the 'operation ofthe device shown in Fig. 2, when subjected to variations of upward pressure as, for example, pressures transmitted to it by the contact'device of a trolley. Fig. 7 and! lig. 8 aremore or less diagrammatic illustrations of modifications ot"v my invention; Fig. 9 illustrates an arrangement of the' device illustrated in'hig. 2 which may be employed in supporting or steadying trolley Wires in a double wire system.

. Referring to Fig. l: The trolley Wire 1 is stretched and is held at the point 3, Where the change in direction of the Wire takes place on a curve, by a rod l pivotally mounted about a joint or support 2. The rod l 1s inclined so as to avoid being struck by the contact device o'l a trolley,tlns arrangement', being necessary because of the construction of certain contact devices now employed. The rod 4 is arranged to support the Wire l against its lateral pull, but since the stress 1n it niust necessarily be in the direction of the rod, the `rod must also exert a vertical force upon the wire which may be repreV sented by So in the force diagram. The stress or iorce S necessarily has a horizontal component equal to some value such as Sh as shown in the diagram, and the 'system is held in sequilibrium by the tension or the reactive force of the trolley wire. les soon as the tension on the trolley Wire varies due, for ex'am le, to fluctuations ot temperature, the condition of equilibrium is .disturbed and the system in rearranging itself to meet the new conditions will assume a new position of equilibrium in which the direction ot' the force S, and incidentally ol the rod 4, will come nearer to or farther away from the horizontal. This movement of the rod 4 will vary the position of the point of support 3 of the trolley wire by raising it or lowering it above or below the original position and by moving it laterally to one side y or the other of the' original position. This resulting motion of the trolley wire 1 is objectionable for obvious reasons and is obviated by my inventionr by providing, in stead of one rod, pivoted rods which are simultaneously subjected to compression and tension and which are so arranged that the point ot support 8 ot the Wire 1 moves in an approximately rectilinear vertical line when thev wire is subjected to vertical force such for example as the upward pressure oi the trolley. rllhe rods are so arranged that the resultante, of the compression and tension force acting' on them intersect the resultant of the horizontal forces acting on the troll-ey wire at a.' point-exactly or approximately on a level with the point of support 3 ot the trolley wire. With thiS-arrangement, the resultant of the forces. aco' ing on the rods of the supporting or steadying device of my invention may be maintained in a horizontal direction so that variations in the tension of the trolley wire l cannot result in a vertical change in position of the wire.

The device illustrated in Fig. 2 consists oia rod 5 pivoted at 'T on a supporting member. a rod 6 pivoted at 8 below the pivot point T of the rod 5, and a lever 9 to which th'e rods 5 and G are respectively pivotally connected at l0 and ll and which connects the rods in a movable closed system. The point of support 3 of the trolley wire l is at the end of the lever 9 below the point of connection ll of the rod (5. With this arrangeinent, the force due to the horizontal component ot' the tension of the Wire l will subject the rod 5 to compression and the rod 6 to tension as shown by the diagram in Fig. 3. The device illustrated is not adapted to support the Weight of the wire, but is merely adapted to holdthe Wire in place or support its lateral pull. The force exerted by the weight of the device has been neglected in the force diagram, since it is comparatively small. The direction and magnitude of the compression and tension forces in the respective rods are shown by the lines Scl and Se respectively, and the lines of direction of these forces intersect at a point O which is situated in the horizontal plane oi' the point of support 3. The direction of the resultant of the forces Sd and Se extends in the horizontal plane and, although it may vary in magnitude in accordance with variations of the lateral pull of the trolley Wire7 it will not vary in direction and will remain vin the horizontal plane. Consequently, variations in the tension or pull of the Wire l cannot ettect or change the position of the point of support 3 and the steadying device Will hold the wirein position and yet be capable of yielding to thevupivard pressure of the trolley.

In Fig. 4 I have disclosed a plan vieiv of a modification of my invention in which a device similar in some respects to that shown in Fig. 2 is disclosed; the diiierence being that instead of one compression member or rod 5 there are two such rods 5. The point of support of the trolley wire isat the end of the lever 9 as in Fig. 2, and the position of the point O is determined by the intersection of the resultant compression forces acting on the rods 5, With the tension force on the rod 6 or, when there are several rods t5, .i the resultant ol"- the tension forces on those rods.

In Fig. 5 I have illustrated a modification of the device in Which the rods 5 and 6 are O of intersection of the forces acting on the v rods is at infinity, but notwithstaiiding this it will be apparent from the construction that variations in the tension of the trolley Wire will not tend to vary the position of the point of support 3.

lt is possible to so proportion the dimensions of the rods 5 and 6 and thi positions of the joints or points Vot support l, 8, l0. and ll that the ppint O of intersection ot the resultant torres will be approximately maintained in the same horizontal plane with the point ot support of the trolley wire as the Wire moves vertically in response to variations ot the upward pressure imparted to it by the contat device of the trolley. ri`his is shown in Fig. 6 by means of the figures shown in full line and dotted lines. The steadying device of Fig. Q is shown in one position in the full lines and in a raised position in the dotted lines. it will be apparent from an inspection ot` this figure that the magnitude of the forces, acting on the device and resulting 'from the horizontal com` ponent of the pull oi' the trolley wire, will not be changed by the vertical movement ot' the Wire nor will the equilibrium of the system be disturbed. The point of intersection O ot the forces acting on the rods 5 and 6 isv` at. any position of the point of support 3, approximatelyon a level With the point of support 3.

The rods 5 and 6, as shown in Figs. 7 and 8, may be connected into a movable closed system in some other manner. ln these igures I have illustrated the rods 5 and 6 hinged at L? and la to bell-crank levers l?, 1S and l), Q0, Which :ia-e pivoted to fixed pins or supports l5 and 16. he arms iS and 20 of the bell-crank levers engage each other by means ot' a tooth segment 2l as shown in Fig. 7 or by means ofthe slot and pin and 28 illustrated in Fig. 8. With this arrangement, the' point' bfcsupport of the trolley Wire will move in a vertical direction and the resultant of the forces in the rods 5 and 6 will always exist in'aihorizontal direction, and, consequently, the equilibrium n of the closed system illustrated will not be disturbed by variations in the magnitude of the pull of the trolley Wire.

When the tension device embodying my invention is employed for double Wire trolley systems and a Contact roller 24 as shown in Fig. 9 is used on the trolley, l prefer to arrai'ige the tension devices 26 and 27 so that point of intersection of the lines o direce meente ont' (lirection of the tension :intl compression forces :ict-ing on seid members, intersect in the line ot' direction ol3 the resultant of the horizontal. forces on the trolley Wire connected to the support.`

` 2. in zi-stenclying device for trolley wires, u closed system connorisingI relatively mow :ible tension and compression members and :i lever pivotztlly connected to said members and odepted to'be connected to :i trolley Wire subjected to n pull having' a horizontel lateral component, said system being so constrnctetlthat the direction of the said component of the tensionnl forces, to which the Wire is subjected, posses through the tionol" the forces acting on the compression and tension members.

3. ln :t steedying device :tor trolley wires, e closed system comprising relatively movable pivotzllly mounted tension end corn-I pression members and means .secured thereto tor engaging the trolley Wire, strict system being` so constructed that the lines of direcn tion of the forces acting onthe compression enel tension members intersect in the line ol the horizontal lateral component of the g forces transmitted, by the Wire to the point of connection of the Wire with the device.

t. ln a stendying device for trolley Wires, t closed System comprising relatively movable tension and comprcseion members andi it member for engaging the trolley wire, said ,l members being; 'so arranged that the point l of intersection of the lines of direction of 5 the forces acting on the tension and com pression members tells in the line oi direction of the resultant of the tensionnl Ylorces acting upon the jooint ot. connection ot the trolley Wire to the device.

Y ln n stendying clerice .tor trolley wires, n. cloeetl system comprising e compression member, e tension member, :intl n subetnirV tielly vertical lever pivotelly` connected at its'uppcr end to seid coi-np 'ession.member7 :it an intermediate'point to sait tension ineinbel and secured et its lower end to it trolley wire subjected to n pull lio/ving :i horizontal lateral component, said system being so arranged that the lilies of clirection of the forces acting on the compression and tension members intersect in the line of the horizontal lateral component of ythe forces acting on the point of connection el the trolley Wire with the lever.

In c stendying device for trolley wires, the combination of two trolley wires, a steadying device for each wire compose@ or `a plurality oit pivotellyconnected rods inclined clr'iwnecdly toward the pleno ol saitl trolley wires, the two etcaclying devices being so arranged that the)r cross each other.. In testimony ivliereot', .t lieve signed name to this specification in the presence of two subscribing witnesses.

netonnet DE trenino.

` llfitneescs:

Enomvn Hrrnsnsrn, Counties` liownnn ZAHN. 

